NGC 67造句怎么写

Viewed from Earth, NGC 6744 is about two-thirds the size of a full moon, but it's so faint you can't see it without a backyard telescope.

这个星云位于距离地球2000光年的天琴座内，它还有另外两个名字：MessierObject57和NGC 6720。

娇小而微微泛黄的星云NGC 6729环绕在年轻变星南冕座R的周围。

The smaller yellowish nebula (NGC 6729) surrounds young variable star R Coronae Australis.

Located about 2,000 light years from Earth in the constellation Lyra, the Ring Nebula is also known as Messier Object 57 and NGC 6720.